A
Andrew K. Skidmore
Researcher at University of Twente
Publications - 544
Citations - 35863
Andrew K. Skidmore is an academic researcher from University of Twente. The author has contributed to research in topics: Normalized Difference Vegetation Index & Vegetation. The author has an hindex of 84, co-authored 529 publications receiving 29944 citations. Previous affiliations of Andrew K. Skidmore include Wageningen University and Research Centre & ITC Enschede.
Papers
More filters
Journal ArticleDOI
Collinearity: a review of methods to deal with it and a simulation study evaluating their performance
Carsten F. Dormann,Jane Elith,Sven Bacher,Carsten M. Buchmann,Gudrun Carl,Gabriel Carré,Jaime Ricardo García Márquez,Bernd Gruber,Bruno Lafourcade,Pedro J. Leitão,Tamara Münkemüller,Colin J. McClean,Patrick E. Osborne,Björn Reineking,Boris Schröder,Andrew K. Skidmore,Damaris Zurell,Sven Lautenbach +17 more
TL;DR: It was found that methods specifically designed for collinearity, such as latent variable methods and tree based models, did not outperform the traditional GLM and threshold-based pre-selection and the value of GLM in combination with penalised methods and thresholds when omitted variables are considered in the final interpretation.
Journal ArticleDOI
Where is positional uncertainty a problem for species distribution modelling
TL;DR: It is proposed that local spatial association is a way to identify the species occurrence records that require treatment for positional uncertainty and developed and presented a tool in the R environment to target observations that are likely to create error in the output from SDMs as a result of positional uncertainty.
Journal ArticleDOI
Improved monitoring of vegetation dynamics at very high latitudes: A new method using MODIS NDVI
TL;DR: In this paper, the authors present a new method for monitoring vegetation activity at high latitudes, using MODIS NDVI, which estimates the NDVI of the vegetation during winter and applies a double logistic function, which is uniquely defined by six parameters that describe the yearly NDVI time series.
Journal ArticleDOI
Narrow band vegetation indices overcome the saturation problem in biomass estimation
TL;DR: In this paper, the potential of narrow band vegetation indices for characterizing the biomass of Cenchrus ciliaris grass measured at high canopy density was evaluated and three indices were tested: Modified Normalized Difference Vegetation Index (MNDVI), Simple Ratio (SR) and Transformed Vegetation index (TVI) involving all possible two band combinations between 350nm and 2500nm.
Journal ArticleDOI
Effects of fire and herbivory on the stability of savanna ecosystems
Frank van Langevelde,Claudius A. D. M. van de Vijver,Claudius A. D. M. van de Vijver,Lalit Kumar,Lalit Kumar,Johan van de Koppel,Nico de Ridder,Jelte van Andel,Andrew K. Skidmore,John W. Hearne,Leo Stroosnijder,William J. Bond,Herbert H. T. Prins,Max Rietkerk +13 more
TL;DR: In this paper, the authors argue that the balance between trees and grasses is, to a large extent, determined by the indirect interactive effects of herbivory and fire, and that the interaction between fire and grass provides a mechanistic explanation for observed discontinuous changes in woody and grass biomass.